Antifriction bearing



Aug. 19, 1930. v. D. cANr-'IELD 1,773,301

ANTIFRICTION BEARING Filed July 19, 1925 Patented Aug. 19, 1930 VIERGEDAVTD GANFIELD, Ol' EUGENE, OREGON ANrnnIc'rIoN BEARING Application nledJuly 19,

The object of my invention is to provide a means for using in connectionwith a shaft having peripherally offset portions, a onepiece standardannular anti-friction bearing--the latter being understood to dene astructurel consisting of two races with balls or rollers between them.

A further object of my invention is to so arrange m anti-frictionbearings that the same may e easily and quickly adjusted as necessary totake up wear.

And a still further object of my invention is so to arrange myanti-friction bearings in certain applications thereof as to include l5the provisionof a lubricating chamber.

It is well known that a one-piece anti-friction bearing is greatlysuperior to a split anti-friction bearing, and numerous attempts havebeen made to produce etlicient split bearings; but without success,apparently, for none is at present in general commercial use.

The difficulty of using a one-piece bearing on a shaft having protrudingperipheral portions, as for example, the projection of the offsets orcrank-arms beyond the crank shaft, consists in providing means formounting the bearing firmly in place. The interior diameter of thebearing can be made of sucient size to pass over the protrudingperipheral portions of the offset portions of the shaft, but saidprotrusions would bar the insertionof the bushing in the eye of bearingon the shaft even though the bushing be split, which of course it mustbe. The same difficulty exists against the use of one-pieceanti-friction bearings on straight shafts having peripheral flanges.

`attain my object by reducing the protrusions on the shaft, over whichthe bushing segment must be slid into place, so as to coincide with theperiphery of the shaft, thus providing a space through which the bush- 0ing segments may be successively inserted into the eye of the bearing,on the shaft.

Thus my invention may be said to consist in the combination with a shafthaving peripheral protrusions, of an anti-frict1on bearing, the races ofwhich are in one piece,

and the interior diameter of the inner race 1926. Serial No. 123,569.

being suicient to permit the passing thereof over the offset portion ofthe shaft and other protrusions thereof; and a split cylindricalushing'adapted to be inserted in the eye of said inner race on saidshaft, that protrusion of the shaft over which the bushing parts areinserted being reduced for part of the circumference of the shaft tocoincide with the periphery of the latter, and thus provide a spacethrough which the bushing parts may be successively inserted.

I will now explainand describe my invention in detail with reference tothe accompanying drawings in which:

Fig. 1 is a side elevation of the extremity of a connnecting rod mountedon my anti-friction bearing; this view showing that side of thecrank-shaft of which the peripheral protrusion of the oiiset portio'n ofthe shaft has been reduced so as to coincide with the periphery of thesaid oiset shaft portion; a portion of the lateral housing of theanti-friction bearing is shown as broken away to disclose the rollerbearing and the races assembled therein;

Fig. 2 shows a central `long r'tudinal section of Fig. 1; this viewparticularly illustrates my anti-friction bearing as composed of twotapered roller-bearing units enclosed at their sides to provide alubricating chamber, and further illustrates means for adjusting thesaid bearing units;

Fig. 3 is a fragmentary section taken on the line 3--3 of Fig. 2 showingthe far side of my anti-friction bearing Wlth respect to Fig. l, andfurther shows one of the discs provided at the sides of my bearing' toform a lubrication chamber. This view further illustrates how thesplit-bushing of my bearing is held together by the split nut at saidfar side;

Fig. 4 is a transverse section of a portion of a crank-shaft on which ismounted a modification of my invention in that ball bearings areprovided in the place of roller bearings, and no lubricating chamber,Vor means of internal lubrication are provided;

Fig. 5 is a perspective view of a portion of a crank-shaft illustratinghow the splitbushing of my bearing is assembled over the split-bus ingsmay be slippediinto the bear.-

in s successlvely;

1g. 6 shows dia rammatlcally the various parts of my antir1ct1on bearinas shown y Fig. 2, and illustrates thermo e by which the parts of mybearin s are successively assembled on the crank-s aft; and

Fig, 7 is a diagrammatic fragmentary sectional view of a. cylinderillustrating the connecting rod of the piston of the c linder as mountedby my improved antiiction bearing on a crank-shaft. p

On the crank-shaft a the connectin rod b and its cap c. are assembledand hed in place by the bolt c and c".

My anti-friction bearing is composed of the outer races d and d', therollers ev and e,;the inner races f and f', and the split-bushin g, saidbushing being threaded at one en and provided with a flange g at 'theother.

A nut 7L is provided whichv is split in half to facilitate its assemblyon the-crank-shaft and over the threaded end of the bushing g, andA isheld together by the bolts h.

Shoulders p and p are provided in the connecting rod b 'and its cap c,which hold the outer races d and d s aced apart, and form thelubrication cham er j, the chamber j being enclosed by two annular discsr and r', which are held in place by bolts r2 and r". The inner races fand f are restrained from lateral movement by the nut h and the flange gon their respective sides.

In the connecting rod b an oil groove i is provided which leads intosaid Alubrication chamber j to provide lubrication for the bearings eand e. Another oil groove lc is provided through the crank-shaft aleading to an oil port Z which feeds the oil into an annular groove fm,in the bushing g. One of the protruding portions a of the crankshaft aisreduced to coincide with the periphery of the crank-shaft as at a2.

The assembly of my anti-friction bearing is as follows:v

Referring to Fig. 6: The disc r is placed over the crank-shaft from theend on which the protruding peripheral portion` is reduced, the bearmgwhich comprises the outer races d', rollers e and the inner face f isnext put in place, and then the other bearing comprising the outer raced, the rollers e and the inner race f, and the disc 1' is put in place.

The split-bushing g isinserted, one part at a time on the crank-shaftand inside the inner race of said bearings, and the discs r and 1". rIhenut It is assembled and held in place by the bolts 71.', and is threadedon the bushing g, to hold the said bushing in lposition.

As the final step, the connecting rod b and cap c are assembled aroundmy anti-friction bearing and bolted in lplace by the bolts c Yand o',the nut h, which is also rovided for taking up the wear of myantiriction bearing, is then adjusted, and my anti-friction bearing iscompletely assembled.

Referring now to Fi 4, Ishow a modilication of my anti-frictlon bearinin which ball-bearings s and s" are substltuted for roller bearings eand e', but otherwise is the same as my other bearing, also nolubrication chamber is provided, nor any channels for internallubrication, both sides of the 'eye of thev connecting rod b and cap cbeing left open to rovide means for external lubrication.

lthough I have only shown my improved anti-friction bearing mounted on acrankshaft, it is understood that it is adapted to any form of ashaftrovided with per1pheral flanges on which it 1s desirable tomount myone-piece anti-friction bearing.

I claim: j

1. In an anti-friction bearing assembly the combination of a crank shafthaving a crank section provided with intermediate spaced shaft sections,an anti-friction bearing mounted on said shaft section comprising a onepiece Aanti-friction ring and a longitudinally divided bushing therefor,the bushing portions provided with a retaining flange at one end and aretaining collar removably mounted on the opposite ends of the bushingportions, one of the angular arms include in said crank section forminga shoulder for the adjacent shaft section and the terminus Y of thecompanion arm of said crank section being made flush with the'said shaftsection, and the bushing adapted to be arranged over the said shaftsection with the retaining flange adjacent to the flush terminus of saidcrank extension, and the said collar mounted on the opposite end betweenthe said bearin and the said shoulder formed by the sai extension of thecompanion crank arm, whereby the said collar is held on said bushing tomaintain the assembly of said anti-friction bearing.

2. In an anti-friction bearing assembly the combination of a crank shafthaving a crank section provided with intermediate spaced shaft sections,an anti-friction bearing mounted on 'said shaft section comprising ananti-friction ring and a longitudinally divided bushing therefor, thebushing portions provided with a retaining flange at one end and aretaining collar removably mounted on the opposite ends of the bushingportions, one of the angular arms included in said crank section forminga shoulder for the adjacent shaft section and the terminus of thecompanion arm of said crank section being l adjacent to the flushterminus of said crank extension, and the said collar mounted on theopposite end between the said bearin and the said shoulder formed by-thesai extension of the companion crank arm, Whereby the said collar isheld on said bushing to maintain the assembly of said anti-frictionbearing.

VIRGIL DAVID CANFIELD.

